SDSS IV MaNGA-Rotation Velocity Lags in the Extraplanar Ionized Gas from MaNGA Observations of Edge-on Galaxies

We present a study of the kinematics of the extraplanar ionized gas around several dozen galaxies observed by the Mapping of Nearby Galaxies at the Apache Point Observatory (MaNGA) survey. We considered a sample of 67 edge-on galaxies out of more than 1400 extragalactic targets observed by MaNGA, in...

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Bibliographic Details
Published in:The Astrophysical journal 2017-04, Vol.839 (2), p.87
Main Authors: Bizyaev, D., Walterbos, R. A. M., Yoachim, P., Riffel, R. A., Fernández-Trincado, J. G., Pan, K., Diamond-Stanic, A. M., Jones, A., Thomas, D., Cleary, J., Brinkmann, J.
Format: Article
Language:English
Subjects:
AMPLITUDES
Astronomical models
Astrophysics
ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
AXIAL RATIO
Correlation
CORRELATIONS
Cosmic dust
Deposition
Disk galaxies
DISPERSIONS
DISTRIBUTION
DUSTS
EMISSION
Galactic evolution
Galactic halos
Galactic rotation
GALAXIES
galaxies: ISM
galaxies: kinematics and dynamics
galaxies: spiral
GALAXY CLUSTERS
H alpha line
Halos
intergalactic medium
ISOCHRONOUS CYCLOTRONS
Kinematics
Light distribution
Mapping
MASS
Potential probes
ROTATION
SIMULATION
Star & galaxy formation
Star formation
Star formation rate
STARS
Stars & galaxies
Stellar mass
Velocity distribution
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Summary:We present a study of the kinematics of the extraplanar ionized gas around several dozen galaxies observed by the Mapping of Nearby Galaxies at the Apache Point Observatory (MaNGA) survey. We considered a sample of 67 edge-on galaxies out of more than 1400 extragalactic targets observed by MaNGA, in which we found 25 galaxies (or 37%) with regular lagging of the rotation curve at large distances from the galactic midplane. We model the observed H emission velocity fields in the galaxies, taking projection effects and a simple model for the dust extinction into account. We show that the vertical lag of the rotation curve is necessary in the modeling, and estimate the lag amplitude in the galaxies. We find no correlation between the lag and the star formation rate in the galaxies. At the same time, we report a correlation between the lag and the galactic stellar mass, central stellar velocity dispersion, and axial ratio of the light distribution. These correlations suggest a possible higher ratio of infalling-to-local gas in early-type disk galaxies or a connection between lags and the possible presence of hot gaseous halos, which may be more prevalent in more massive galaxies. These results again demonstrate that observations of extraplanar gas can serve as a potential probe for accretion of gas.
ISSN:0004-637X
1538-4357
DOI:10.3847/1538-4357/aa6979